Set of coupling elements



FIG. 1 is a right rear perspective view from above of a set of coupling elements embodying my new design, the left side being a mirror image of the right side;

FIG. 2 is a right rear perspective view from below thereof;

FIG. 3 is a left front perspective view from below thereof; and,

FIG. 4 is a left front perspective view from above of the set of coupling elements as assembled. 

The ornamental design for a set of coupling elements, as shown and described. 